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package com.sun.star.xml.security.uno;

import org.w3c.dom.Node;
import com.sun.star.xml.sax.XDocumentHandler;
import org.w3c.dom.Attr;
import org.w3c.dom.NamedNodeMap;

/*
 * this class is used to parse a document into SAX events
 */
class ParsingThread
{
    /*
     * the Node which will be handled with in the next step
     */
    private Node m_node;
    
    /*
     * the event to be handled in the next step.
     * true means endElement event, false otherwise.
     */
    private boolean m_bIsEndEvent;
    
    /*
     * the document handler which receives generated SAX events
     */
    private XDocumentHandler m_xDocumentHandler;
    
    /*
     * the TestTool which receives UI feedbacks
     */
    private TestTool m_testTool;
    
         
        ParsingThread(Node node, XDocumentHandler xDocumentHandler, TestTool testTool) 
        {
            m_node = node;
            m_xDocumentHandler = xDocumentHandler;
            m_testTool = testTool;
            
            m_bIsEndEvent = false;
        }
        
        /*
         * changes the document handler.
         */
        protected void setHandler(XDocumentHandler xDocumentHandler)
        {
            this.m_xDocumentHandler = xDocumentHandler;
        }
 
        /*
         * sends the next SAX event.
         * when there is no further step, then false is returned,
         * otherwise, true returned.
         */
        protected boolean nextStep()
        {
            boolean rc = true;
            
            try
            {
                String message;
            int type = m_node.getNodeType();
            if (!m_bIsEndEvent)
            /*
             * the next event is not a endElement event.
             */
            {
                switch (type)
                {
                case Node.DOCUMENT_NODE: /* startDocument */
                    m_testTool.updatesCurrentSAXEventInformation("startDocument");
                    m_xDocumentHandler.startDocument();
                    m_testTool.updatesUIs();
                    break;
                case Node.ELEMENT_NODE: /* startElement */
                    String nodeName = m_node.getNodeName();
                    message = "startElement:"+nodeName;			
                    NamedNodeMap attrs = m_node.getAttributes();
                    
                    AttributeListHelper attributeListHelper = new AttributeListHelper();
                    
                    int length = attrs.getLength();
                    for (int i=0; i<length; ++i)
                    {
                        Attr attr = (Attr)attrs.item(i);
                        attributeListHelper.setAttribute(attr.getName(), "CDATA", attr.getValue());
                        message += " "+attr.getName()+"='"+attr.getValue()+"'";
                    }
                    
                    m_testTool.updatesCurrentSAXEventInformation(message);
                    m_xDocumentHandler.startElement(m_node.getNodeName(), attributeListHelper);
                    
                    m_testTool.updatesUIs();
                    break;
                case Node.TEXT_NODE: /* characters */
                    message = m_node.getNodeValue();
                    if (message != null)
                    {
                        m_testTool.updatesCurrentSAXEventInformation("characters:"+message);
                        m_xDocumentHandler.characters(message);
                        m_testTool.updatesUIs();
                    }
                    break;
                case Node.COMMENT_NODE: /* comment */
                    break;
                case Node.PROCESSING_INSTRUCTION_NODE: /* PI */
                    m_testTool.updatesCurrentSAXEventInformation("processingInstruction:"+m_node.getNodeName()+" "+m_node.getNodeValue());
                    m_xDocumentHandler.processingInstruction(m_node.getNodeName(), m_node.getNodeValue());
                    m_testTool.updatesUIs();
                    break;
                }
                
                /*
                 * figures out the event for the next step.
                 */
                switch (type) 
                {
                    case Node.DOCUMENT_NODE: 
                    case Node.ELEMENT_NODE:
                        if (m_node.hasChildNodes()) 
                        /* 
                         * for a Document node or an Element node,
                         * if the node has children, then the next event will be for its
                         * first child node.
                         */
                        {
                            m_node = m_node.getFirstChild();
                        }
                        else 
                        /*
                         * otherwise, the next event will be endElement.
                         */
                        {
                            m_bIsEndEvent = true; 
                        }
                        break; 
                    case Node.TEXT_NODE:
                    case Node.PROCESSING_INSTRUCTION_NODE:
                    case Node.COMMENT_NODE: 
                        Node nextNode = m_node.getNextSibling();
                        if (nextNode != null) 
                        /*
                         * for other kinds of node,
                         * if it has a next sibling, then the next event will be for that
                         * sibling.
                         */
                        {
                            m_node = nextNode; 
                        } 
                        else
                        /*
                         * otherwise, the next event will be the endElement for the node's
                         * parent node.
                         */
                        {
                            m_node = m_node.getParentNode();
                            m_bIsEndEvent = true; 
                        }
                        break; 
                }
            }
            else
            /*
             * the next event is an endElement event.
             */
            {
                switch (type)
                {
                    case Node.DOCUMENT_NODE: /* endDocument */
                        m_testTool.updatesCurrentSAXEventInformation("endDocument"); 
                        m_xDocumentHandler.endDocument(); 
                        m_testTool.updatesUIs();
                        
                        /*
                         * no further steps.
                         */
                        rc = false;
                        break;
                    case Node.ELEMENT_NODE: /* endElement */
                        m_testTool.updatesCurrentSAXEventInformation("endElement:"+m_node.getNodeName()); 
                        m_xDocumentHandler.endElement(m_node.getNodeName()); 
                        m_testTool.updatesUIs();
                            
                        Node nextNode = m_node.getNextSibling();
                        if (nextNode != null)
                        /*
                         * if the node has a next sibling, then the next event will be the
                         * start event for that sibling node.
                         */
                        {
                            m_node = nextNode;
                            m_bIsEndEvent = false;
                        }
                        else
                        /*
                         * otherwise, the next event will be the endElement for the node's
                         * parent node.
                         */
                        {
                            m_node = m_node.getParentNode();
                        }
                        break;
                }
            }
        }
        catch(  com.sun.star.xml.sax.SAXException e)
        {
            e.printStackTrace();
            
            /*
             * forces to end.
             */
            rc = false;
        }
        
        return rc;
    }
}